WRB

W. R. Berkley Corporation$67.32+1.12 (+1.69%)

Prev Close$66.20·MCap$24.85B·P/E14.04·Vol447.1K·Yield0.00%

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Buys (12M)

$534.96M

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Sells (12M)

$791.6K

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Net Activity

Net Buyer

$534.17M

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at W. R. Berkley Corporation (WRB) has been dominated by buying, with 16 insider purchases totaling $534.96M and 5 insider sales totaling $791.6K. The most recent insider transaction was by MITSUI SUMITOMO INSURANCE CO LTD (10 percent owner), who purchased $21.49M worth of shares on Feb 27, 2026. W. R. Berkley Corporation operates in the Financial Services sector, within the Insurance - Property & Casualty industry, with a market cap of $24.85B.

WRB Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 27, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	300,000	$71.65	$21.49M	58,522,272
Feb 25, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	553,654	$71.13	$39.38M	58,222,272
Feb 20, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	505,582	$70.70	$35.74M	57,668,620
Feb 18, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	566,386	$70.92	$40.17M	57,163,040
Feb 13, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	40,000	$70.93	$2.84M	56,596,652
Feb 11, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	97,996	$69.68	$6.83M	56,556,652
Feb 6, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	40,000	$70.88	$2.84M	56,458,656
Feb 4, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	315,221	$68.05	$21.45M	56,418,656
Jan 30, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	485,000	$68.22	$33.09M	56,103,436
Jan 28, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	1,028,931	$67.35	$69.30M	55,618,436
Jan 23, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	698,000	$67.19	$46.90M	54,589,504
Jan 21, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	630,000	$67.64	$42.61M	53,891,504
Jan 16, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	535,000	$68.49	$36.64M	53,261,504
Jan 14, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	811,041	$68.58	$55.62M	52,726,504
Jan 9, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	470,000	$69.45	$32.64M	51,915,464
Jan 7, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	681,218	$69.61	$47.42M	51,445,464
Aug 19, 2025	BERKLEY WILLIAM R	Executive Chairman	Sell	4,277	$71.23	$304.7K	0
Aug 19, 2025	BERKLEY WILLIAM R JR	President and CEO	Sell	4,696	$71.24	$334.5K	0
Aug 19, 2025	Sgaglione Lucille T	EVP	Sell	717	$71.24	$51.1K	0
Aug 19, 2025	SHIEL JAMES G	EVP - Investments	Sell	744	$71.23	$53.0K	0
Aug 19, 2025	Welt Philip S	EVP & Secretary	Sell	678	$71.23	$48.3K	0
Sep 14, 2022	Talisman Jonathan	Director	Buy	6	$67.60	$405.57	564
Aug 2, 2022	BROCKBANK MARK ELLWOOD	Director	Buy	6,000	$61.96	$371.8K	6,000
Dec 23, 2021	BROCKBANK MARK ELLWOOD	Director	Sell	25,000	$80.31	$2.01M	802,659

WRB Insider Buying Activity

The following table shows recent insider purchases of W. R. Berkley Corporation (WRB) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 27, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	300,000	$71.65	$21.49M	58,522,272
Feb 25, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	553,654	$71.13	$39.38M	58,222,272
Feb 20, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	505,582	$70.70	$35.74M	57,668,620
Feb 18, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	566,386	$70.92	$40.17M	57,163,040
Feb 13, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	40,000	$70.93	$2.84M	56,596,652
Feb 11, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	97,996	$69.68	$6.83M	56,556,652
Feb 6, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	40,000	$70.88	$2.84M	56,458,656
Feb 4, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	315,221	$68.05	$21.45M	56,418,656
Jan 30, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	485,000	$68.22	$33.09M	56,103,436
Jan 28, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	1,028,931	$67.35	$69.30M	55,618,436
Jan 23, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	698,000	$67.19	$46.90M	54,589,504
Jan 21, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	630,000	$67.64	$42.61M	53,891,504
Jan 16, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	535,000	$68.49	$36.64M	53,261,504
Jan 14, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	811,041	$68.58	$55.62M	52,726,504
Jan 9, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	470,000	$69.45	$32.64M	51,915,464
Jan 7, 2026	MITSUI SUMITOMO INSURANCE CO LTD	10 percent owner	Buy	681,218	$69.61	$47.42M	51,445,464
Sep 14, 2022	Talisman Jonathan	Director	Buy	6	$67.60	$405.57	564
Aug 2, 2022	BROCKBANK MARK ELLWOOD	Director	Buy	6,000	$61.96	$371.8K	6,000

WRB Insider Selling Activity

The following table shows recent insider sales of W. R. Berkley Corporation (WRB) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Aug 19, 2025	BERKLEY WILLIAM R	Executive Chairman	Sell	4,277	$71.23	$304.7K	0
Aug 19, 2025	BERKLEY WILLIAM R JR	President and CEO	Sell	4,696	$71.24	$334.5K	0
Aug 19, 2025	Sgaglione Lucille T	EVP	Sell	717	$71.24	$51.1K	0
Aug 19, 2025	SHIEL JAMES G	EVP - Investments	Sell	744	$71.23	$53.0K	0
Aug 19, 2025	Welt Philip S	EVP & Secretary	Sell	678	$71.23	$48.3K	0
Dec 23, 2021	BROCKBANK MARK ELLWOOD	Director	Sell	25,000	$80.31	$2.01M	802,659